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In the ordinary life, the super magnets is a very common thing. And thousands of years ago, the working people of our country made one of the four great inventions of the compass according to the characteristics of the magnet. To this day, a magnet is a very useful thing. From a variety of special electronic equipment, to the usual teaching aid toy, can often see the figure of the magnet. Below is a horseshoe Ceramic Magnets, absorbing bulk metal in the above is the gadolinium (sound g). This is a kind of iron, cobalt, nickel can be attracted by the magnet elements, is currently widely used to enhance the field of nuclear magnetic resonance imaging.

We know that the main component of magnetic Fe3O4 is. An ordinary small ferrite magnet is made of black iron oxide. But due to the nature of Fe3O4, resulting in his iron objects on the suction is not too strong and the magnetic will with the passage of time fade away. In this case, how to make a strong suction and not recession of the magnet? Under such a premise, the neodymium iron boron magnet arises at the historic moment.

This surface after anti-corrosion treatment and bright magnet is the magnet of neodymium iron boron magnet, and its chemical formula is Nd2Fe14B. The most commonly used neodymium iron boron magnets by neodymium, iron, boron three elements of high temperature sintering, is by far the strongest artificial magnet. If the core elements of traditional Fe3O4 is iron, then neodymium iron boron magnet reason why there is such a strong magnetic is neodymium. These pieces of metal in the figure below are neodymium: